Background: Several studies have suggested that the use of drains did not improve surgical outcomes after hip replacement. There is still a lack of strict recommendations for drainage use.Methods: Prospective, randomised study was performed. The analysis included 100 patients. Inclusion criteria: idiopathic hip osteoarthritis. Exclusion criteria: secondary coxarthrosis, autoimmune disease, coagulopathy, venous/arterial thrombosis, hepatic/renal insufficiency, cement, or hybrid endoprostheses. Results: We found smaller haematomas in the no-drainage group (9.76 mm vs. 10.33 mm, p = 0.653). The visual analogue scale score was lower in the no-drainage group (5 vs. 6). Less bloodloss in the no-drainage group (1,124 ml vs 1,224 ml, p = 0.59). Two patients had a deep joint infection in the no-drainage group, none in the drainage group.Conclusion: It is noteworthy that two cases of early infections were observed in the no-drainage group, whereas there were no such complications in the drainage group. Further research is warranted to validate our findings.Trial registration: The study was successfully retrospectively registered in Clinicaltrial.gov with identification number: NCT04333264 (03/04/2020). https://clinicaltrials.gov/ct2/show/NCT04333264?term=NCT04333264&draw=2&rank=1